/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 *@filename:  function/time/sysdate_local.cc
 */ 

#include <server_includes.h>
#include CSTDINT_H
#include <function/time/sysdate_local.h>
#include <tztime.h>
#include <session.h>

/**
    Converts current time in time_t to COLLAPSAR_TIME represenatation for local
    time zone. Defines time zone (local) used for whole SYSDATE function.
*/
void Item_func_sysdate_local::store_now_in_TIME(COLLAPSAR_TIME *now_time)
{
  Session *session= current_session;
  session->variables.time_zone->gmt_sec_to_TIME(now_time, time(NULL));
}


String *Item_func_sysdate_local::val_str(String *)
{
  assert(fixed == 1);
  store_now_in_TIME(&ltime);
  buff_length= (uint) my_datetime_to_str(&ltime, buff);
  str_value.set(buff, buff_length, &my_charset_bin);
  return &str_value;
}


int64_t Item_func_sysdate_local::val_int()
{
  assert(fixed == 1);
  store_now_in_TIME(&ltime);
  return (int64_t) TIME_to_uint64_t_datetime(&ltime);
}

double Item_func_sysdate_local::val_real()
{
  assert(fixed == 1);
  store_now_in_TIME(&ltime);
  return uint64_t2double(TIME_to_uint64_t_datetime(&ltime));
}


void Item_func_sysdate_local::fix_length_and_dec()
{
  decimals= 0;
  collation.set(&my_charset_bin);
  max_length= MAX_DATETIME_WIDTH*COLLAPSAR_CHARSET_BIN_MB_MAXLEN;
}


bool Item_func_sysdate_local::get_date(COLLAPSAR_TIME *res,
                                       uint32_t )
{
  store_now_in_TIME(&ltime);
  *res= ltime;
  return 0;
}


int Item_func_sysdate_local::save_in_field(Field *to, bool )
{
  store_now_in_TIME(&ltime);
  to->set_notnull();
  to->store_time(&ltime,COLLAPSAR_TIMESTAMP_DATETIME);
  return 0;
}

